Cleaning brush



FIG. 1 is a front view of an embodiment of a cleaning brush showing my new design;

FIG. 2 is a back view of the embodiment thereof;

FIG. 3 is a right side view of the embodiment thereof;

FIG. 4 is a left side view of the embodiment thereof;

FIG. 5 is a top plan view of the embodiment thereof; and,

FIG. 6 is a bottom plan view of the embodiment thereof. 

CLAIM The ornamental design for a cleaning brush, as shown and described. 